在三元反铁磁体 NdCoSi 中引入氢化诱导铁磁性。
Hydrogenation inducing ferromagnetism in the ternary antiferromagnet NdCoSi.
机构信息
CNRS, Université de Bordeaux, ICMCB, 87 avenue du Docteur Albert Schweitzer, 33608 Pessac Cedex, France.
出版信息
Inorg Chem. 2010 Jun 7;49(11):4836-42. doi: 10.1021/ic902079u.
The hydride NdCoSiH obtained by exposure at 523 K of the ternary antiferromagnet NdCoSi under a pressure of 4 MPa of hydrogen crystallizes in the tetragonal ZrCuSiAs-type structure where H atoms occupy the tetrahedral [Nd(4)] site. The hydrogenation induces an increase in the unit cell volume close to 6%. The investigation of NdCoSiH by magnetization measurements reveals its ferromagnetic behavior below T(C) = 20.5(5) K. Neutron powder diffraction shows that the T(C) temperature is associated with a ferromagnetic arrangement of the Nd moments (2.3(2) mu(B) at 1.5 K) parallel to the c axis as observed for NdFeSi. The magnetic properties, magnetic structure, and the value of the Nd ordered magnetic moment evidenced for NdCoSiH are discussed using both band structure calculations and a comparison with the behavior of NdCoSi and NdFeSi.
在 4 MPa 氢气压力下，将三元反铁磁体 NdCoSi 在 523 K 下暴露，得到的氢化物 NdCoSiH 结晶为四方 ZrCuSiAs 型结构，其中 H 原子占据四面体 [Nd(4)]位。氢化导致单元体积增加接近 6%。通过磁化测量研究 NdCoSiH 发现，其在 T(C) = 20.5(5) K 以下表现出铁磁行为。中子粉末衍射表明，T(C)温度与 Nd 磁矩的铁磁排列有关（在 1.5 K 时为 2.3(2) mu(B)），与 NdFeSi 观察到的方向平行于 c 轴。使用能带结构计算和与 NdCoSi 和 NdFeSi 行为的比较，讨论了 NdCoSiH 的磁性、磁结构和 Nd 有序磁矩的值。
Zotero 插件